Apparatus for making sheet-metal vessels



M. A. ROLLMAN APPARATUS FOR IAKIIIG SHEET IETAL VESSELS rum no 25. 1922E A g 9 1 m 7 h ,& um. i tw n Aug; 192g pletion of the stroke the die.

Patented Au 7, 1928.

um ran STATES mom a. new, or noun Jog, rnuusnvuu. nrm'rus roa MAKINGsum-Marni. vassana Application filed November 25, 1922., Serial Io.808,202.

The object of this invention is to provide an apparatus for economicallyfastening the sheet-metal bottom on a sheet-metal vessel and at the sametime forming the curled bead on the rim of the vessel, as more fullyhereinafter set forth. In the drawing Fig. 1 is a vertical sectionalview showing an apparatus capable. of carrying out-my metho p Fi 2 is adetail cross-sectional v 1ew showmg the parts in osition at the com-Referring to the drawing annexed by refcreme-characters, 5 desi ates abase having formed on it a central circular boss 6, at the base of whichis formed an annular groove 7 formin one-half of the rim-bead die. Theother ha f of the rim-bead die is formed in two dielates 8 removablyresting upon the base an provided with a complementary die-groove 9.

Upstanding from the center of the boss 6 is a ri 'd post 10, andslidingly'fittin down overt is post is a sleeve 11 which epends from thetop wall of a cylindrical form 12 whose lower ed e sliding lly embracesthe outer wall of the 0s 6. his form 12 is taered upwardly and is heldin its up position y means of a strong coil-spring 13. I Reci rocatinglsu ported (by meails not shown; above t e orm, is a die-head 14 whoselower edge 15 is cylindrically shaped and is adapted, when the die-head1s fprced down, to embrace and fit around the u per end of the form 12.Within this dieead is formed an annular semi-circular diegroove 16, andcentrally within the diehead is mounted a circular plunger 17 havin anupstanding guide-pin 18 and a air 0- expansible e01 springs 19 normallyorcing the plunger downwardly to the limit of its downwardmovem'ent,this limit brin 'ng the lower face of the plunger 17 on a pane below thedie-groove 16.

The open-ended, tapered can or bucketbody 20 is sli ped down over theform 12 with its rim-e ge lying in the dieroove 7, this ed e beingpreferably sli ht y flared outwardly before the bucketbo y is put on theform. Previously formed in the bucketbody, by pressing the metalannularly inwardly, is an inwardly-extending open bead 21,- this beadbeing ositioned at a distance from the bottom point where it willrestupon the top edge ,lar flange 23 exten in out the area of the ing thebottom ge of the bucket, at 'a of the form 12 when the rim edge isresting previousl formed and shaped as described, is thus? seed on theform, the bottom disk 22 is dro ped into placeon the bead 21, thisbottom 'sk being toward the bottom edge of the buckety, which flan liesagainst the interior of the bucket-bo and is desirably previously curledinwardly slightly.

After the parts of the bucket are thus placed on the form, the die-headis forcibly moved downwardly. The first result of the downward movementof the die-head is to cause a downward movement of the form 12 a ainstthe action of ring 13 and thus curl t e rim-edge of the ucket body bymeans of thedie-grooves 7 and 9. Further movement of the die-headdownwardl crushes or flattens the bead 21 and curls the ttom rimedge ofthe bucket-body and the flange 23' inwardly to thus not only solidlyinterlock these flanges but also to solidly clamp the bottom-plateagainst the bead 21. The spring-pressed p unger 17 serves not only toassist in curling the bottom flange of the bucket, but also to clamp thebottom plate solidly in position ainst the head throughttom plate durinall the operations, the normal position 0 e the plunger 17 being suchthat it desirably comes into contact w1th the bottomplate 22 at aboutthe same moment that the die-groove 16 comes in contact with the bottomrim of the vessel. In this way, it will be observed that the entireoperation P of beading the rim-edge of the vessel and" fastening in thebottom plate is accomplished with one stroke ofthe die-head. It will beobserved also that the manner of form-.

plate 22 and the manner of fastening it in position provides the bucketwith a very substantial closure which will require no further operationsto make it water-tight except the usual tinning process and also whichwill avoid the use of objectionable exterior beads on the can-body.

I claimk I t 1. An apparatus for the purpose set forth consist 221g of abase-and cooperat' plates for p ucing a rim-bead on the ucketbody, aform adapted to-fit within the bug: et-body mounted onsaid base andnormally pupwardly, and a reciproeat in the die-groove 7. After thebucket-body.

rovided with an annuing die-head mounted above the form and. sulpportingsaid form, and die means adapted adapted to coo erate therewith to beadthe w en thrust downwardly on top of the orm bottom ed e o thebucket-body and force to form the bottom bead and lock the botsaid-formownwardly to form the rim-bead tom disk in the bucket and simultaneously5 of the bucket-body. depress the form against the action of the II 2.An apparatus for the purpose set forth spring to thereby shape therim-bead. consisting of a base havingxa boss and means In testimonywhereof I hereunto aflix my forming a rim-bead on t e bucket body, asignature. bucket form having its lower open end sur- 1 rounding saidboss, a spring for resiliently I MICHAEL A. ROLLMAN.

